UV index (y  v )n. A scale ranging from zero to ten, used in estimating the risk for sunburn that an unprotected fair-skinned person would have if exposed to the ultraviolet radiation in midday sunlight, accounting for conditions such as cloud cover, ozone, and location. |
| UV index (yv) A scale ranging from 0 to 10, used to estimate the risk for sunburn in midday sunlight, with 0 indicating no risk and 10 indicating maximal risk. The UV index is effectively a rough measure of the amount of harmful ultraviolet radiation in the sunlight reaching the Earth's surface at a given location, given the time of year and current atmospheric conditions, expressed in terms of the risks that are associated with exposure to that amount of radiation. |
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